Device to prevent singles in doubleend yarn operation



Jan. 5, 1943. w c, G|LL I 2,307,261

D EVICE' To PREVENT SINGLES IN DOUBLE-END YARN OPERATION Filed Jan. 8, 1942 ATTORNEYS Patented Jan. 5, 1943 DEVICE TO PREVENT SINGLES IN DOUBLE- END YARN OPERATION William C. Gill, Johnston, R; L

Application January 8, 1942, Serial No. 426,038

7 Claims.

This invention relates to a device or apparatus for the handling of double-end yarns.

In the handling of double-end yarns, such for instance as roving, should one of these yarns break, the unbroken end may continue to run for some length of time before noticed. Various complicated devices have been proposed for preventing a single in a double-end operation but these in a large part have either been too complicated or have not proved fully satisfactory.

One of the objects of this invention is to provide an extremely simple arrangement which will break the second unbroken yarn should one of the yarns become severed or broken and thus prevent the second of two yarns which are runnimg together from continuing to operate should one of those yarns become broken.

Another object of the invention is to provide a device which will receive its actuation by the movement of the broken yarn, and need not depend upon any power operation for accomplishing this result.

A further object of this invention is to provide an arrangement so that when th apparatus is stopped, accidental sagging of the yarn will not cause the device to operate.

Another object of the invention is to provide a guard arrangement so that it may be individual to each double-end which is running in parallel arrangement along the length of the frame and yet all may be manipulated simultaneously.

With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is an elevation, partly in section, and

largely diagrammatic, illustrating the travel of two ends through a drafting operation, with these two ends twisted together to form a double yarn.

Fig. 2 is a view of the yarn guide portion shown in Fig. 1 and on a larger scale, showing one of the yarns, or one of the ends, broken and In proceeding with this invention I mount a member having a plurality of prongs hingedly upon the yarn guide in such a position that when it drops by its own weight about its hinge it will be out of the normal path of travel of the yarn, but will be in such a position that should a yarn break it will be engaged and pulled by the yarn into the path of movement of the yarn, whereupon the yarn 'drawn forward by the drafting apparatus, will pull my member up into such position that it will engage the remaining end of the double-yarn and as this engagement will cause this end to be held, it will pull apart between the pronged member and the drafting roll so that both ends will then become broken.

With reference to the drawing, l0 designates one suppy package and II another supply package, from which yarn, l2 and I3 is drawn beneath the guide bar I through a slot l5, in guide plate i6, and then on either side of the rod l'l supported by the plate It and on the forward side thereof. The two yarns thus led through the guide l5 and I1 pass about the draft rolls l8, I9, 20 and are drafted in the span 2| between these rolls and the rolls 22 and 23. From thence the yarn extends to the pigtail guide 24 and is twisted and packaged as at 25, twist being put in by the ring 26 and its traveler 21.

It will be appreciated that the above descrip- 3 mounted upon a pintle pin 33 which is supported by eyes .34 on either side of the eye secured to the block 3|, which eyes 34 are fast to the guide plate l6. A stop finger 35 is provided to limit the downwardly swinging movement of the pronged block as shown in Fig. l. The entire assembly is mounted upon the plate l6 by means of the bolt 36 having a head 31 and nut 38.

In Fig. 2 1 have illustrated one of the yarns l2 as broken and as dropping down into engagement with prongs 32 of the severing device 30. Both yarns I2 and I3 will continue to be fed forwardly, and thus the yarn l2 having caught in the prongs, will pull the severing device about its hinge from the position shown in Fig. 2 to the position shown in Fig. 3 where the prongs will engage the yarn l3 as well as the yarn 12' and will hold this yarn fast in these prongs against advancing, whereby the pull of the draft rolls I8 and I9 and will cause the yarn [3 to break, as well as the yarn I 2 to again break at some point between the severing device 30 and the roll 18. Thus both yarns will become broken and no single yarn will go onto the package 25.

In some cases in starting up the machine before tension has been applied to the yarn l2 and I3, it is desirable that any sag which might occur in these yarns should not engage the severing device 30. I have therefore provided a downwardly extending bracket arm 40 at spaced intervals on the guide rod l4, usually at either end thereof, and have provided a tie rod 41 connecting these arms 40, and upon this tie rod I have mounted a guard plate 42 at the ends of arms 44 which may either extend continuously along the rod 4| or may be positioned at spaced intervals so that upon the swinging of the rod 4i such for instance as by means of handle 43, the guard 42 at the end of the arms 44 will swing into the position shown in dotted lines in Fig. 1 so as to completely cover the severing device 30 throughout the length of the frame and prevent a thread which will drop or sag from coming into engagement therewith. Thus by merely swinging one handle 43 I may actuate all of the guards throughout the length of the frame, such for instance as at the time of starting, and after starting has occurred I may swing the arm 43 back to the position shown in full lines in Fig. 1 permitting my severing devices to operate should a failure occur of any one of the yarns where double ends are provided as heretofore explained.

I claim:

1. In an apparatus for handling double end yarn, a slotted yarn guide, means for severing the second of two yarns when one of the yarns becomes severed, comprising a member hinged below the normal running path of the yarn to be engaged by a dropping severed end and pulled upon by its forward movement to swing the member, and means for so mounting said member on said guide adjacent the slot therein as to cause said member to move into the normal running path of the yarn to engage a second unsevered yarn and cause a severance thereof.

2. In an apparatus for handling double end yarn, a slotted yarn guide, means for severing the second of two yarns when one of the yarns becomes severed, comprising a multi-pronged member positioned below the normal running path of the yarn and of a dimension to extend on both sides of the slot in said guide to be engaged by a dropping severed end and pulled' upon by its forward movement, and means for so pivoting said member on said guide as to cause it to move into the normal running path of the yarn to cause its prongs to engage a second unsevered yarn and cause a severance thereof.

3. In an apparatus for handling double end yarn, a slotted yarn guide, means for severing the second of two yarns when one of the yarns becomes severed, comprising a multi-pronged member hinged below the normal running path of the yarn and of a dimension to extend on both sides of the slot in said guide to be engaged by a dropping severed end and pulled upon by its, forward movement to swing the member, and

means for so mounting said member on said guide as to cause it to move into the normal running path of the yarn to cause its prongs to engage a second unbroken yarn and cause a severance thereof.

4. In an apparatus for handling double end yarn, means for severing the second of two yarns when one of the yarns becomes severed, comprising a member positioned below the normal running path of the yarn to be engaged by a dropping severed end and pulled upon by its forward movement, and means for so mounting said member as to cause it to move into the normal running path of the yarn to engage a second unbroken yarn and cause a severance thereof, and a guard to cover said member when not to be used.

5. In an apparatus for handling a plurality of double end yarns in generally parallel running arrangement, individual yarn guides for each double end, individual means for each double end for severing the second of two yarns when one of the yarns becomes severed, each comprising a separate member pivoted to one of said guides at a position below the normal running path of each double yarn to be engaged by a dropping severed end and pulled upon by its forward movement, and means for so mounting said member as to cause it to move into the normal running path of the yarn, to engage a second yarn and cause a severance thereof.

6. In an apparatus for handling a plurality of double end yarns in generally parallel running arrangement, individual means for each double end for severing the second of two yarns when one of the yarns becomes severed, comprising a separate member positioned below the normal running path of the yarn to be engaged by a dropping severed end and pulled upon by its forward movement and means for so mounting said member as to cause it to move into the normal running path of the yarn, to engage a second unbroken yarn and cause a severance thereof, and guard means to cover each of said severing means when not to be used and means for operating a plurality of said guard means simultaneously.

7. In an apparatus for handling a plurality of double end yarns in generally parallel running arrangement, individual means for each double end for severing the second of two yams when one of the yarns becomes severed, comprising a separate member positioned below the normal running path of the yarn to be engaged by a dropping severed end and pulled upon by its forward movement, and means for so mounting said member as to cause it to move into the normal running path of the yarn, to engage a second unbroken yarn and cause a severance thereof, and guard means to cover each of said severing means when not to be used, and a common shaft for operating all of the guards along one side of the apparatus at one time.

WILLIAM C. GILL. 

